The behaviour of a solution of helmholtz' equation near a confluence of boundary-conditions, involving directional derivatives
G.W. Veltkamp · Centrum Wiskunde & Informatica (CWI), the national research institute for mathematics and computer science in the Netherlands · 1956
Contents:1. Introduction.2. Bounds for the derivntives of functions that satisfy certain boundary-conditions. Construction of an auxiliary Green 1 s function.4. The behaviour of a harmonic function near a confluence of boundary-conditj_ons.5. The behaviour of n solution of Helmholtz' equation near a confluence of boundary-conditions.The case 6.The behaviour of a solution of Helmholtz 1 equation near a vertex of the boundary.•Tr1eorem 2.~'?.L t ,r-, ".l e • " .